[metapost] defaultcolormodel

[Stephan Hennig]

Hi,

I'm wondering what the meaning of variable defaultcolormodel is.  The
manual is rather terse (p.28):

  The ‘current default’ color model can be set up using the internal
  variable defaultcolormodel.  Table 2 lists the valid values.

Well, variable defaultcolormodel determines the colour space of the
black ink that is used for drawing and filling strokes, i.e., whether 0,
(0,0,0) or (0,0,0,1) is written into the output.  Is there anything else
that is affected by defaultcolormodel?

Best regards,
Stephan Hennig